Camera module

ABSTRACT

Disclosed is a camera module. The camera module includes: a lens barrel disposed in a housing to receive a lens assembly; an elastic member in at least one of the housing and the lens barrel; a driving unit moving the lens barrel relative to the housing; and a sensor unit fixed to the housing.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.17/223,802, filed Apr. 6, 2021, which is a continuation of U.S.application Ser. No. 16/523,635, filed Jul. 26, 2019, now U.S. Pat. No.11,029,491, issued Jun. 8, 2021; which is a continuation of U.S.application Ser. No. 15/827,814, filed Nov. 30, 2017, now U.S. Pat. No.10,412,284, issued Sep. 10, 2019; which is a continuation of U.S.application Ser. No. 14/411,788, filed Dec. 29, 2014, now U.S. Pat. No.9,860,432, issued Jan. 2, 2018; which is the U.S. national stageapplication of International Patent Application No. PCT/KR2013/005777,filed Jun. 28, 2013; which claims priority to Korean Application No.10-2012-0071201, filed Jun. 29, 2012; all of which are herebyincorporated by reference in their entirety.

TECHNICAL FIELD

The embodiment relates to a camera module.

BACKGROUND ART

Recently, a camera module has been installed in a mobile communicationterminal, an information technology (IT) device, such as a PDA or an MP3player, a vehicle, and an endoscope. As the technology has beendeveloped toward the high-pixel camera module from the conventional VGAcamera equipped with 0.3 mega pixels, the camera module has beenmanufactured in a small size with a slim structure according to targetsto which the camera module is installed. In addition, the camera modulehas been equipped with various additional functions, such asauto-focusing or optical zoom functions, at the low manufacturing cost.

Meanwhile, the camera module manufactured in these days is equipped withan image sensor module, which is manufactured through a COB (chip ofboard) scheme, a COF (chip of flexible) scheme or a CSP (chip scalepackage) scheme, and is usually connected to a main substrate through anelectric connection unit, such as a PCB (printed circuit board) or anFPCB (flexible printed circuit board).

However, users recently request the camera module, which can be directlymounted on the main substrate similar to a general passive element, insuch a manner that the manufacturing process for the camera module canbe simplified while reducing the manufacturing cost.

The camera module is generally manufactured by attaching an imagesensor, such as a CCD or a CMOS, to a substrate through a wire bondingscheme or a flip chip scheme. An image of a subject is focused by theimage sensor and the focused image is stored as data in a memory, whichis installed inside or outside the camera module. In addition, thestored data are converted into electric signals and the electric signalsare displayed as images through a display medium, such as an LCD or a PCmonitor provided in a device.

A camera module according to the related art includes a housing, animage sensor supported on a bottom of the housing to convert an imagesignal received through a lens into an electric signal, a lens group tofocus an image signal of a subject to the image sensor, and a barrel inwhich the lens group are stacked. The housing, the lens group and thebarrel are sequentially coupled with each other.

In addition, an FPCB mounted thereon with chip components, which areelectric components serving as a condenser and a resistor to drive theimage sensor including a CCD or a CMOS, is electrically connected to thebottom of the housing.

In the camera module having the above structure according to the relatedart, in a state that a plurality of circuit components have been mountedon the FPCB, an ACF (anisotropic conductive film) is inserted betweenthe substrate and the image sensor, and heat and pressure are appliedthereto in such a manner that the substrate, the image sensor and theACF are fixedly bonded and conducted with each other and an IR cut-offfilter is attached to an opposite side.

In addition, in a state that the barrel provided therein with aplurality of lens groups is temporally screw-coupled with the housing,as described above, the assembled PCB used for mounting devices isfixedly bonded to the bottom of the housing by an adhesive.

Meanwhile, after the PCB, to which the image sensor is attached, hasbeen fixedly bonded to the housing coupled with the barrel, a focusadjustment is carried out with respect to a subject (resolution chart)located in front of the barrel and spaced apart from the barrel by apredetermined distance. At this time, the focus adjustment of the cameramodule can be achieved between the lens group and the image sensor whileadjusting the vertical displacement by rotating the barrel screw-coupledwith the housing.

DISCLOSURE Technical Problem

The embodiment provides a camera module capable of effectivelyinhibiting hand-shaking.

Technical Solution

According to the embodiment, there is provided a camera moduleincluding: a lens barrel disposed in a housing to receive a lensassembly; an elastic member in at least one of the housing and the lensbarrel; a driving unit moving the lens barrel relative to the housing;and a sensor unit fixed to the housing.

Advantageous Effects

The camera module according to the embodiment can compensate forhand-shaking by driving the lens barrel with respect to the housing.That is, the driving unit can compensate for hand-shaking by moving thelens barrel relative to the housing.

Particularly, the camera module according to the embodiment allows animage formed on the sensor unit to have a negative distortion by thelens assembly. Accordingly, when the shaking is compensated for bymoving the lens barrel, an error at an outer peripheral portion of theimage can be minimized.

DESCRIPTION OF DRAWINGS

FIG. 1 is a sectional view showing a camera module according to theembodiment.

FIG. 2 is a diagram illustrating an optical system including a lensassembly, an infrared (IR) cut-off filter unit, and a sensor unit.

FIG. 3 is a diagram illustrating an image incident onto the sensor unitthrough the lens assembly.

FIG. 4 is a diagram illustrating distortion in an optical systemincluding a lens assembly, an IR cut-off filter unit, and a sensor unit.

FIG. 5 is a diagram illustrating movement of an image due tohand-shaking and compensation thereof.

FIG. 6 is a sectional view showing a camera module according to anotherembodiment.

FIG. 7 is a sectional view showing a camera module according to anotherembodiment.

BEST MODE Mode for Invention

In the description of the embodiments, it will be understood that wheneach lens, unit, part, hole, protrusion, groove or layer is referred toas being “on” or “under” another lens, unit, part, hole, protrusion,groove or layer, it can be “directly” or “indirectly” on the other lens,unit, part, hole, protrusion, groove or layer or one or more interveninglayers may also be present. Such a position has been described withreference to the drawings. The thickness and size of each layer shown inthe drawings may be exaggerated, omitted or schematically drawn for thepurpose of convenience or clarity. In addition, the size of elementsdoes not utterly reflect an actual size.

FIG. 1 is a diagram showing a camera module according to the embodiment.FIG. 2 is a diagram illustrating an optical system including a lensassembly, an IR cut-off filter unit, and a sensor unit. FIG. 3 is adiagram illustrating an image incident onto the sensor unit through thelens assembly. FIG. 4 is a diagram illustrating distortion in an opticalsystem including a lens assembly, an IR cut-off filter unit, and asensor unit. FIG. 5 is a diagram illustrating movement of an image dueto hand-shaking and compensation thereof.

Referring to FIGS. 1 to 5, the camera module according to the embodimentincludes a lens barrel 100, a lens assembly 200, a first elastic member310, a second elastic member 320, a first housing 410, a second housing420, an IR cut-off filter unit 500 and a sensor unit 600, a circuitboard 800, and driving units 710, 720, 730, and 740.

The lens barrel 100 receives the lens assembly 200 therein. The lensbarrel 100 has a receiving groove for receiving the lens assembly 200.The receiving groove may have a shape corresponding to a shape of thelens assembly 200.

The lens barrel 100 may have a rectangular shape or a cylindrical shape.That is, the outer portion of the lens barrel 100 may have a rectangularshape or a circular shape.

The lens barrel 100 may be connected with the first housing 410. Indetail, the lens barrel 100 is connected to the first housing 410through the first elastic member 310. That is, the lens barrel 100 maybe movably connected to the first housing 410 by the first elasticmember 310.

In addition, the lens barrel 100 includes a light incident groove, whichis open upward (toward an object). The light incident groove exposes thelens assembly 200. An image is incident into the lens assembly 200through the light incident groove.

The lens assembly 200 is disposed in the lens barrel 100. In detail, thelens assembly 200 is disposed in the receiving groove. The lens assembly200 is inserted into the receiving groove. In more detail, the outerportion of the lens assembly 200 may have a circular shape. In moredetail, the outer portion of the lens assembly 200 may have a circularshape when viewed from the top. In addition, the lens assembly 200 mayhave a rectangular shape when viewed from the top.

The lens assembly 200 includes a plurality of lenses 210, 220, 230, and240. For instance, the lens assembly 200 may include a first lens 210, asecond lens 220, a third lens 230 and a fourth lens 240. The third lens230, the second lens 220, and the first lens 210 may be sequentiallylaminated.

Further, a first spacer and a second spacer may be interposed among thelenses 210, 220, 230, and 240. The lenses 210, 220, 230, and 240 arespaced apart from each other through the first spacer and the secondspacer.

Although it has been described that the lens assembly 200 includes fourlenses, the embodiment is not limited thereto. That is, the lensassembly 200 may include one to three lenses or at least five lenses.

Referring to FIG. 2, the lens assembly 200, the IR cut-off filter unit500, and the sensor unit 600 constitute the optical system.

The first lens 210, the second lens 220, the third lens 230, and thefourth lens 240 may be sequentially disposed from the object side to theimage side. In order to acquire an image of a subject, lightcorresponding to image information of the subject is incident to thesensor unit 600 by passing through the first lens 210, the second lens220, the third lens 230, the fourth lens 240, and the IR cut-off filterunit 500.

The first lens 210 may have positive (+) refractive power, the secondlens 220 may have negative (−) refractive power, the third lens 230 mayhave the positive (+) refractive power, and the fourth lens 240 may havethe negative (−) refractive power. Further, the first lens 210, thesecond lens 220, the third lens 230, and the fourth lens 240 may includeglass or plastic.

The first lens 210 has a convex surface at the object side R1 thereof,and the first lens 210 has a convex, concave, flat surface at the imageside R2 thereof. Further, the first lens 210 may have an aspherical orspherical surface at the object side R1 thereof. Preferably, the firstlens 210 has double-convex surfaces in the vicinity of an optical axis.

A curvature of the image side R2 of the first lens 210 may satisfy thefollowing equation 1.

0≤R<0.01  Equation 1

In detail, the curvature of the image side R2 of the first lens 210 maysatisfy the following equation 7.

0≤R<0.001  Equation 7

In more detail, the curvature of the image side R2 of the first lens 210may be zero (0).

That is, the image side R2 of the first lens 210 may have a very smallcurvature. The image side R2 of the first lens 210 may include the flatsurface. The image side R2 of the first lens 210 may have the flatsurface or a curved surface similar to the flat surface. The image sideR2 of the first lens 210 is similar to the flat surface so thattolerance of a small optical system according to the embodiment may bereduced.

The second lens 220 may have a meniscus shape. The second lens 220 mayhave a concave surface at the object side R1 thereof and the second lens220 may have a concave surface at the image side R4 thereof. That is,the second lens 220 may have double-concave shapes. In addition, thesecond lens 220 may have a spherical or aspherical surface at the objectside R3 and the image side R4 thereof. It is preferable that the secondlens 220 has a meniscus shape where a concave surface is directed to theobject side.

The third lens 230 has a convex surface at the image side thereof in thevicinity of the optical axis and has positive power. For example, thethird lens 230 may have a concave surface at the object side thereof inthe vicinity of the optical axis.

The third lens 230 may have a concave surface at the object side thereofand have a convex surface at the image side R6 thereof. In addition, thethird lens 230 may have a spherical or aspherical surface at the objectside R5 and the image side R6 thereof.

The focus length of the third lens 230 may satisfy the followingequation 2.

0.5<f3/F<1.0  Equation 2

In Equation 2, f3 represents an effective focal distance of the thirdlens 230, and F represents a whole focus distance of a small opticalsystem according to the embodiment.

In detail, the focus length of the third lens 230 may satisfy thefollowing equation 4.

0.6<f3/F<0.9  Equation 4

The fourth lens 240 may have a meniscus shape. The fourth lens 240 mayhave a convex surface at an object side R7 thereof and the fourth lens240 may have a concave surface at an image side R8 thereof. In addition,the fourth lens 240 may have an aspherical surface at the object side R7and the image side R8 thereof.

Further, the fourth lens 240 includes at least one aspheric inflectionpoint.

In this case, the at least one aspheric inflection point may be formedon the object side R7 of the fourth lens 240. In addition, the at leastone aspheric inflection point CP may be formed on the image side R8 ofthe fourth lens 240. The aspheric inflection point of the fourth lens240 may adjust the maximum radiation angle of a main light incident intothe light receiving device 70.

The focus length of the fourth lens 240 may satisfy the followingequation 3.

−10<f4/F<−0.5  Equation 3

In Equation 3, f4 represents an effective focal distance of the fourthlens 240, and F represents a whole focus distance of a small opticalsystem according to the embodiment.

In detail, the focus length of the third lens 230 may satisfy thefollowing equation 5.

−1<f4/F<−0.5  Equation 5

If the light receiving device 70 serving as an imaging surface R14 is acharge coupled device (CCD) or a complementary metal oxide semiconductor(CMOS), an angle to ensure the quantity of light exists with respect toeach pixel. If a different angle is used in the pixel, the quantity oflight is not ensured, a shading phenomenon in which an outer portion ofthe image is darkened.

Therefore, the maximum of incident angle of the main ray is adjusted byforming the aspheric inflection point at the image side R8 of the fourthlens 240 facing the image side, thereby inhibiting the outer portion ofthe image screen from being darkened.

The small optical system may satisfy the following Equation 6.

1<tt1/F<1.3  Equation 6

In Equation 6, tt1 represents a distance between the object side of thefirst lens 210 and the image side thereof, and F represents the wholeeffective focus length.

When the optical system of the embodiment is designed as describedabove, the optical system may have a negative distortion. That is, asshown in FIGS. 3 and 4, the optical system may the negative distortion.

For example, when a field height is in the range of 0 F to 1.0 F in theoptical system, a distortion of an image of the sensor unit 600 may bein the range of −2% to 0%.

In detail, when the field height is in the range of 0.7 F to 1.0 F inthe optical system, the distortion of an image of the sensor unit 600may be in the range of 0% to −2%.

In addition, when the field height is in the range of 0 F to 1.0 F inthe optical system, the distortion of an image of the sensor unit 600may be in the range of −2% to −5%.

In detail, when the field height is in the range of 0.7 F to 1.0 F inthe optical system, the distortion of an image of the sensor unit 600may be in the range of −2% to −5%.

The first elastic member 310 is disposed in the first housing 410. Thefirst elastic member 310 is fixed to the first housing 410. Further, thefirst elastic member 310 is fixed to the lens barrel 100. The firstelastic member 310 movably fixes the lens barrel 100 to the firsthousing 410.

The first elastic member 310 may include a spring. In detail, the firstelastic member 310 may include a leaf spring.

The first housing 410 receives the lens barrel 100. The first housing410 is connected to the lens barrel 100 through the first elastic member310.

The first housing 410 may include plastic or metal. The first housing410 may have a rectangular container shape.

The second housing 420 receives the first housing 410. That is, thefirst housing 410 is disposed in the second housing 420. The firsthousing 410 is connected to the second housing 420 by the second elasticmember 320.

The first housing 410 is movably fixed in the second housing 420 by thesecond elastic member 320. The first housing 410 may float in the secondhousing 420.

The second housing 420 is fixed to the circuit board 800. The secondhousing 420 may be coupled with the circuit board 800. The secondhousing 420 may include plastic or metal.

The second elastic member 320 is connected to the first housing 410 andthe second housing 420. The second elastic member 320 movably fixes thefirst housing 410 to the second housing 420. The second elastic member320 may include a spring. In detail, the second elastic member 320 mayinclude a leaf spring.

The IR cut-off filter unit 500 is disposed in the second housing 420.The IR cut-off filter unit 500 is fixed to the circuit board 800 and maybe fixed to the second housing 420. The IR cut-off filter unit 500filters an incident IR. The IR cut-off filter unit 500 may filter lighthaving an excessively long wavelength introduced into the sensor unit600.

The IR cut-off filter unit 500 may be formed by alternately depositingtitanium oxide and silicon oxide on optical glass. In order to cut-offthe IR, thicknesses of the titanium oxide and the silicon oxide may besuitable adjusted.

The sensor unit 600 is received in the second housing 420. The sensorunit 600 includes a CCD image sensor and a CMOS image sensor. Inaddition, the sensor unit 600 further includes the circuit board 800connected to the image sensor. The sensor unit 600 converts an incidentimage into an electrical signal.

The sensor unit 600 is fixed to the circuit board 800. The sensor unit600 may be mounted on the circuit board 800. The sensor unit 600 iselectrically connected to the circuit board 800.

A photographing region of the sensor unit 600 may have the size of 2.5mm×4.0 mm. Further, a unit cell of the sensor unit 600 may have lengthand breadth of 2 μm or less.

The circuit board 800 may cover a bottom of the second housing 420. Thecircuit board 800 is coupled with the second housing 420. The circuitboard 800 may include a printed circuit board (PCB). The circuit board800 may be electrically connected to the sensor unit 600. The circuitboard 800 may apply a signal for driving the sensor unit 600. Further,the circuit board 800 may receive a signal from the sensor unit 600.

The sensor unit 600 is mounted on the circuit board 800. In detail, thesensor unit 600 may be fixed to the circuit board 800. That is, thesensor unit 600 may be fixed to the second housing 420 through thecircuit board 800.

Further, the circuit board 800 may be electrically connected to thedriving units 710, 720, 730, and 740. That is, a signal for driving thedriving units 710, 720, 730, and 740 may be applied to the driving units710, 720, 730, and 740 through the circuit board 800.

The driving units 710, 720, 730, and 740 drive the lens barrel 100 withrespect to the first housing 410. The driving units 710, 720, 730, and740 drive the first housing 410 with respect to the second housing 420.

The driving units 710, 720, 730, and 740 may move the lens barrel 100and the first housing 410 by a magnetic force. The driving units 710,720, 730, and 740 may include a first driving unit 710, a second drivingunit 720, a third driving unit 730, and a fourth driving unit 740. Thedriving units 710, 720, 730, and 740 may move the lens barrel relativeto the housing 400 by a magnetic force. In this case, the magnetic forcemay be applied to a direction inclined with respect to the optical axisOA of the lens assembly 200.

The first driving unit 710 is attached to the lens barrel 100. The firstdriving unit 710 may be fixed to the lens barrel 100. The first drivingunit 710 may be disposed at an outer side of the lens barrel 100.

The first driving unit 710 may include a coil. The first driving unit710 may receive a driving signal through the circuit board 800. Thefirst driving unit 710 may generate a magnetic field according to anelectrical signal.

The first driving unit 710 may apply an attractive force or a repulsiveforce to the second driving unit 720 in a direction inclined withrespect to a reference horizontal plane. In this case, the first drivingunit 710 may apply the magnetic force to the second driving unit 720 atan angle of about +20° to about +70° with respect to the referencehorizontal plane. In detail, the first driving unit 710 may apply themagnetic force to the second driving unit 720 at an angle of about +30°to about +50° with respect to the reference horizontal plane R.

The second driving unit 720 is attached to the first housing 410. Indetail, the second driving unit 720 may be fixed to the first housing410. In more detail, the second driving unit 720 may be fixed to aninner side of the first housing 410.

The second driving unit 720 includes a magnetic material. The seconddriving unit 720 may have a plate shape. That is, the second drivingunit 720 may be prepared as a plate magnet.

The first driving unit 710 is close to the second driving unit 720. Thefirst driving unit 710 may be spaced apart from the second driving unit720 by a very small distance. The distance between the first drivingunit 710 and the second driving unit 720 may be in the range of about 50μm to about 1000. The first driving unit 710 may face the second drivingunit 720. Accordingly, a magnetic field may be generated between thefirst driving unit 710 and the second driving unit 720.

The first driving unit 710 and the second driving unit 720 move the lensbarrel 100 relative to the first housing 410. In detail, the firstdriving 710 and the second driving unit 720 may move the lens barrel 100relative to the first housing 410 in an optical-axis direction of thelens assembly 200.

The third driving unit 730 is attached to the first housing 410. Indetail, the third driving unit 730 may be fixed to the first housing410. In more detail, the third driving unit 730 may be fixed to an outerside of the first housing 410.

The third driving unit 730 includes a magnetic material. The thirddriving unit 730 may have a plate shape. That is, the third driving unit730 may be prepared as a plate magnet.

The fourth driving unit 740 is attached to the second housing 420. Indetail, the fourth driving unit 740 may be fixed to the second housing420. In more detail, the fourth driving unit 740 may be fixed to aninner side of the second housing 420.

The fourth driving unit 740 may include a coil. The fourth driving unit740 may receive a driving signal through the circuit board 800. Thefourth driving unit 740 may generates a magnetic field according to anelectrical signal.

The third driving unit 730 is close to the fourth driving unit 740. Thethird driving unit 730 may be spaced apart from the fourth driving unit740 by a very small distance. The distance between the third drivingunit 730 and the fourth driving unit 740 may be in the range of about 50μm to about 1000 μm. The third driving unit 730 may face the fourthdriving unit 740. Accordingly, a magnetic force may be generated betweenthe third driving unit 730 and the fourth driving unit 740.

The third driving unit 730 and the fourth driving unit 740 move thefirst housing 410 relative to the second housing 420. In detail, thethird driving 730 and the fourth driving unit 740 may move the firsthousing 410 relative to the second housing 420 in a horizontal directionwith respect to an optical axis of the lens assembly 200.

As a result, the driving units 710, 720, 730, and 740 may move the lensassembly 200 relative to the sensor unit 600 in the optical axisdirection and in a direction horizontal to the optical axis.

For example, when the subject is horizontally moved due to shaking, thefirst housing 410 may be tilted or horizontally moved by the thirddriving unit 730 and the fourth driving unit 740. Accordingly, arelative horizontal location between the lens assembly 200 and thesensor 600 may be adjusted.

Further, a focus length between the lens assembly 200 and the sensorunit 600 may be adjusted by the first driving unit 710 and the seconddriving unit 720.

Particularly, since the optical system has a negative distortion,movement of an image according to shaking in a horizontal direction isminimized, and accordingly, a compensation error may be reduced.

That is, as shown in FIG. 5, in the camera module according to theembodiment, when an image is moved in the sensor unit 600 due toshaking, the driving units 710, 720, 730, and 740 move the lens barrel100 in a direction opposite to a moving direction of the image. Forexample, the driving units 710, 720, 730, and 740 move the image to theinitial position by horizontally moving or tilting the lens barrel 100.

In this case, since the optical system has a negative distortion, anerror of an image according to movement of the lens barrel 100 may beminimized in an outer peripheral portion of the image.

That is, the optical system of the camera module according to theembodiment has the negative distortion, so it is possible to inhibit themovement distance of the image from being increased due to the shakingas the image is located away from the optical axis.

Particularly, the camera module according to the embodiment can minimizeimage shaking at an outer peripheral portion of the photographing regionand maximize a shaking correction effect.

FIG. 6 is a diagram showing a camera module according to anotherembodiment. The embodiment will be described by making reference to theabove description of the camera module. The description of the previousembodiment with respect to the camera module may be incorporated in thedescription of the embodiment except for the modifications.

Referring to FIG. 6, the first housing 410 may be omitted from thecamera module according to the embodiment. Further, a second housing 420may be directly connected to the lens barrel 100 through an elasticmember. In this case, the elastic member may connect the lens barrel 110to the second housing 420 in a direction inclined with respect to anoptical axis of the lens assembly 200.

Further, a first driving unit 710 is attached to the lens barrel 110.The first driving unit 710 may include a magnetic material.

In addition, a fourth driving unit 740 is attached to an inner side ofthe second housing 420. The fourth driving unit 740 may include a coil.

A fifth driving unit 750 is attached onto the circuit board 800. Indetail, the fifth driving unit 750 may be interposed between the firstdriving unit 710 and the circuit board 800. The fifth driving unit 750may include a coil.

Further, the fourth driving unit 740 and the fifth driving unit 750 maybe electrically to the circuit board 800.

The lens barrel 100 may be driven in a horizontal directionperpendicular to the optical axis by a magnetic force between the firstdriving unit 710 and the fourth driving unit 740. Moreover, the lensbarrel 100 may be driven in the optical axis direction by a magneticforce between the first driving unit 710 and the fifth driving unit 750.

That is, the lens barrel 100 may be driven in the horizontal directionby the first driving unit 710 and the fourth driving unit 740. Further,the lens barrel 100 may be driven in the optical axis direction by thefirst driving unit 710 and the fifth driving unit 750.

The camera module according to the embodiment may correct shaking andadjust automatic focus by a simple structure.

FIG. 7 is a diagram showing a camera module according to anotherembodiment. The embodiment will be described by making reference to theabove description of the camera module. The description of the previousembodiment with respect to the camera module may be incorporated in thedescription of the embodiment except for the modifications.

Referring to FIG. 7, in the camera module according to the embodiment, athird driving unit 730 is omitted and a fourth driving unit 740 may beclose to the second driving unit 720. In detail, the fourth driving unit740 may be interposed between the second driving unit 720 and thecircuit board 800.

Accordingly, the first housing 410 may be relatively moved according toan attractive force or a repulsive force between the second driving unit720 and the fourth driving unit 740. In detail, the lens barrel 100 maybe driven according to the attractive force or the repulsive forcebetween the first driving unit 710 and the second driving unit 720, andthe first housing 410 may be driven according to a magnetic forcebetween the second driving unit 720 and the fourth driving unit 740.That is, the first driving unit 710 may share the second driving unit720 with the fourth driving unit 740

Therefore, the camera module according to the embodiment may havereduced number of components and have the simple structure by omittingthe third driving unit 730.

Any reference in this specification to “one embodiment,” “anembodiment,” “example embodiment,” etc., means that a particularfeature, structure, or characteristic described in connection with theembodiment is included in at least one embodiment of the invention. Theappearances of such phrases in various places in the specification arenot necessarily all referring to the same embodiment. Further, when aparticular feature, structure, or characteristic is described inconnection with any embodiment, it is submitted that it is within thepurview of one skilled in the art to affect such feature, structure, orcharacteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

1. A lens driving apparatus comprising: a housing; a lens barrel disposed in the housing; a first coil disposed between the housing and the lens barrel; a magnet overlapped with the first coil in a first direction perpendicular to an optical axis; a second coil overlapped with the magnet in a second direction parallel to the optical axis; and a lens assembly disposed in the lens barrel, wherein the first coil and the second coil share the magnet, wherein the lens assembly comprises at least five lenses, wherein at least two lenses of the five lenses comprise a convex surface in one direction of the optical axis, and wherein a width of a center of the magnet is smaller than a width of a center of an area of the second coil in the first direction.
 2. The lens driving apparatus according to claim 1, wherein the housing comprises a first housing and a second housing, and wherein the first housing is disposed on the second housing.
 3. The lens driving apparatus according to claim 2, wherein the magnet is disposed on the first housing and the second coil is disposed on the second housing.
 4. The lens driving apparatus according to claim 2, comprising: a first elastic member connecting the lens barrel and the first housing; and a second elastic member coupled with the first housing and the second housing.
 5. The lens driving apparatus according to claim 2, wherein the second coil is disposed between a lower portion of the magnet and the second housing.
 6. The lens driving apparatus according to claim 1, wherein the magnet faces the first coil in the first direction, and wherein the magnet faces the second coil in the second direction.
 7. The lens driving apparatus according to claim 2, wherein the magnet and the second coil are configured to move the first housing so that the lens barrel moves relative to the second housing.
 8. The lens driving apparatus according to claim 2, wherein no other magnet is disposed between the magnet and the second coil in the second direction.
 9. The lens driving apparatus according to claim 2, wherein the first housing comprises an upper portion and a side portion extending from an end of the upper portion in the second direction, and wherein the magnet comprises a lower surface facing an upper surface of the second coil, an upper surface facing the upper portion of the first housing, a first side surface facing the first coil, and a second side surface facing an inner side surface of the first housing.
 10. The lens driving apparatus according to claim 1, wherein a width of the magnet is greater than a width of the first coil in the second direction.
 11. A lens driving apparatus comprising: a circuit board; a housing disposed on the circuit board; a lens barrel disposed in the housing; a first coil disposed between the housing and the lens barrel; a magnet disposed on the housing; and a second coil disposed between the housing and the circuit board; wherein the magnet is overlapped with the first coil in a first direction perpendicular to an optical axis and overlapped with the second coil in a second direction parallel to the optical axis, wherein no other magnet is disposed between the magnet and the second coil in the second direction, and wherein a width of a center of the magnet is smaller than a width of a center of an area of the second coil in the first direction.
 12. The lens driving apparatus according to claim 11, wherein the housing comprises a first housing and a second housing, and wherein the first housing is disposed on the second housing.
 13. The lens driving apparatus according to claim 12, wherein the magnet is disposed on the first housing and the second coil is disposed on the second housing.
 14. The lens driving apparatus according to claim 12, comprising: a first elastic member connecting the lens barrel and the first housing; and a second elastic member coupled with the first housing and the second housing.
 15. The lens driving apparatus according to claim 12, wherein the second coil is disposed between a lower portion of the magnet and the second housing.
 16. The lens driving apparatus according to claim 11, wherein the magnet faces the first coil in the first direction, and wherein the magnet faces the second coil in the second direction.
 17. The lens driving apparatus according to claim 12, wherein the magnet and the second coil are configured to move the first housing so that the lens barrel moves relative to the second housing.
 18. The lens driving apparatus according to claim 12, wherein the first housing comprises an upper portion and a side portion extending from an end of the upper portion in the second direction, and wherein the magnet comprises a lower surface facing an upper surface of the second coil, an upper surface facing the upper portion of the first housing, a first side surface facing the first coil, and a second side surface facing an inner side surface of the first housing.
 19. The lens driving apparatus according to claim 11, wherein a width of the magnet is greater than a width of the first coil in the second direction.
 20. A lens driving apparatus comprising: a circuit board; a housing disposed on the circuit board; a lens barrel disposed in the housing; a first coil disposed between the housing and the lens barrel; a magnet overlapped with the first coil in a first direction perpendicular to an optical axis; a second coil disposed between the housing and the circuit board; and a lens assembly disposed in the lens barrel, wherein the magnet and the second coil are configured to correct shaking, wherein the magnet and the first coil are configured to adjust autofocus, wherein the magnet is overlapped with the second coil in a second direction parallel to the optical axis, wherein the lens assembly comprises at least five lenses, wherein the at least five lenses comprise a lens having a convex surface and a lens having a concave shape at an object side, and wherein a width of a center of the magnet is smaller than a width of a center of an area of the second coil in the first direction. 